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HENRY O. DEMAREST, O-F Y NEW YORK, Letters Patent No. 68,964, datedSeptember 17, 1867.

IMPROVEMENT IN BOITIER-FEEDERS.

Beit known that I, HENRY O. DEMAREST, of the city, count-y, and State ofNew York, have invented a new and useful Improvement in AutomaticBoiler-Feeders; and I do hereby declare that the following is a full,clear, and exact description of the said invention, and of theconstruction and operation ot' the` same, so as to enable any personskilled in the art to make and construct thc same, referenccboing had`to the annexed drawings, making a part of t-his specification, of whichdrnwingsi Figure 1 is a front view of said machine.' Y

Figure 2 is a rear view of said machine.

Figure 3 is a top view of said machine. l i i Figure 4 is a view of thechambers and their connection with each other, one chamber `beingremoved to show in part the internal arrangement of said connection. p

Figure 5 is a view of two of the heads orsupports of said machine, thesides shown being those which are applied to the sides of saidconnection,

Figure 6 shows the internal arrangement of one of said heads `orsupports.

Figure 7 shows the internal arrangement of the connection abovementioned.

In said drawings, A and A are two liollow chambers, of equal weight Vandsuitable capacity, said chambers being connected by the hollow lever D,and also fastened to it,v Said chambers and lever are supported `by andoscillate on the axis G which passes through the heads E, E, and E, tlieweight of said chambers and lever being supported by E and E alone.Communication throughsaid lever Ais prevented `by apartition in thclatter, as represented by OO in tig. 7. D is said lever or connection.The 'ports or aperturesd d d dmtgo i through said lever, Vone on eachside of said partition, and also communicate through said lever witheach chamber, @Zand d with A, and dzand d with A. E, E', and E are headsor supports. E and E ai'e firmly attached to the bed-.plate which restsupon the boiler I. Into the front of Eenter thesteam pipe C and thewater pipe B, which pipes pass through E, diverging into two branches(as represented in fig. 6) and opening out on the inside face of thehead and near its top, at the ports 1 andB, B opening out at the'port2,l `f lhese l i ports are sol constructed that when A is depressed theports 1 and 2 in the head E are in the same line, and respectivelycommunicate directly with the `ports d and d in the lever. When A isdepressed the ports 2 and 3, in like manner,are in a line, andrespectively communicate directlywith the ports cZ and d in said leverThe port 4 in the head E communicates with apipe, (as represented iniig. 6,) which pipe leads, inside of said head, into said boiler to alower depth than the steam pipe C. When A is depressed the said port isin a line and communicates directly with cl in the lever D, When'A isdepressed saidrport is in alineand communicates directly with d. E is a.movable head attached to the bed-plate F by screws passing `through theslot 5, (as

Vin fig. 5,) and on the other side of the head through a similarslotfanld also by screws passing throughfthe holes 6 and 7, theselastnamed screws having the washers e', of a triangular form, with arounding base, and playing freely therein and in the holes 6 andu'. e isa nut working upon threads in the axis G. i Around the axis,`and betweenthe nut and the head E', is airing of India rubber or other elasticsubstance.V By this arrangement the closeness of the contact between theheads E and E and the lever D can belincreascd or diminished atpleasure,and leakage between the faces of the heads E and E( and the lever isprevented. The port 2 in the head E goes through the head andcommunicates wit-l1 the waste pipeB. It is so constructedthat when thechamber A' is depressed said port is in a line and communicates directlywith the portal in the leverl), (but on the face of said leverl oppositeto the face represented in figli.) 4When A'is depressed said port is ina line and communicates-directly with the port cl in said lever, but onsaid opposite face. The port 2 insaid head communicates with a pipowhich empties into the boiler at a point lower than the orifice of thesteam pipe C. vWhen the chamber A is depressed said port is in a lineand communicates directly with d in the lever D. WhenAis depressed saidport is in a line and communicates directly with clA in said lever. E isa head firmly attached to the bed-plate F, andwith E sustains the weightof said chambersand lever. pipe in the boiler'I communicating with theport 2 is flush, or nearly so, with theouter surface of the boiler. Oversaid pipe is a ringwhose inner circumference is larger than that'of thepipe. Said ring is sunkush into the bed-plate, and lea-kage is preventedby washers of India rubber or other elastic substances. Cris asteam-feed pipe, communicating 2 Y es, 96H

freely with the steam in the boiler whenever its lower orifice is abovethe surface'of .the Water, and is of such length that its lowerextremity is at the level at which it is desired to'lreep lthe water. Bis an injector oommunioating with the water-feed piperb. The-injectorneed not be used where a sufficient head of Water can be obtained, thewater being fed to the machine by a pipein place of the injector. K is arest which sustains either chamber when it is depressed. The springs LL, with the rollers attached, are so constructed and adjusted as toprevent-oscillation until the elevated chamber becomes heavier' than thedepressedchamher by any given weight.

The operation of said machine is as follows: As soon as the water in theboiler is below the mouth of the steam pipe C steam passes through saidp'ipe into the chamber whichat thatmoment is depressed. At the same timethe stop-cock of the injector B (or of the Water pipe if the linjectoris not used) should be turned, and thewater begins to enter the chamberwhich is elevated. Suppose A to be the chamber which is at this timedepressed, then the steam from the boiler passes through the steam pipe(land the port 1 in the head E, and thence into the port d in the leverD, and thence 'nto the chamber A. The water in saidchamberthereuponpasses through the port df in the lever D into the ports Llfand 2 in theheads E and'E, and thence through the corresponding pipes into theboiler. If no water at this time happens to be in the chamber A saidchamber will till with steam from the steam pipe C. .In the-mean timewater passes through theinjector, (or water pipe,) through the port 2 ofthe head E into the port d o t' the lever D, and thence into thechamberA. As soon as this chamber lls or becomes heavier than thechamber A it depresses itself, the port d'1. in the lever D comes intocommunication with the ports 4 and 2 in the heads E and E', and thewater begins to discharge into the boiler. y The chamber A' being thenelevated, ,it in turn fills with water passing through the port 2inthehead E into the port d in the lever D. As soon as the water in theboiler. is above the mouth of the steam pipe C, the steambeing preventedfrom cnteringthe said pipe, the machine ceases to act. If, during thetime the machine ceases to act, the injector (or Water pipe)` be notturned off, the water passes through the port 2 in the head E, throughthe port d or 'ol' in the lever D, as the ease may be, and through theport `2 in the head E into the waste pipe B. v

What I claim as new and as my invention, and desire to secure by LettersPatent, is-

1. The'arrangementof the lever D, heaflsE and' E', and'washer ef,substantially upon the principle and in the manner herein set forth. V I

2. The arrangement of the chambers Arend A', lever D, heads E, E', andE", nut e, screws and washer e', discharge pipe, steam pipe'O, and theinjector pipe B, constructed and`combined substantially as hereinaboveset forth.

HENRY O. DEMAREST.

'Witnesses A. M. C'. SMITH, Jr., HENRY Basen.

